/*-------------------------------------------------------------------------
 |   RXTX License v 2.1 - LGPL v 2.1 + Linking Over Controlled Interface.
 |   RXTX is a native interface to serial ports in java.
 |   Copyright 2002-2004 Michal Hobot MichalHobot@netscape.net
 |   Copyright 1997-2007 by Trent Jarvi tjarvi@qbang.org and others who
 |   actually wrote it.  See individual source files for more information.
 |
 |   A copy of the LGPL v 2.1 may be found at
 |   http://www.gnu.org/licenses/lgpl.txt on March 4th 2007.  A copy is
 |   here for your convenience.
 |
 |   This library is free software; you can redistribute it and/or
 |   modify it under the terms of the GNU Lesser General Public
 |   License as published by the Free Software Foundation; either
 |   version 2.1 of the License, or (at your option) any later version.
 |
 |   This library is distributed in the hope that it will be useful,
 |   but WITHOUT ANY WARRANTY; without even the implied warranty of
 |   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 |   Lesser General Public License for more details.
 |
 |   An executable that contains no derivative of any portion of RXTX, but
 |   is designed to work with RXTX by being dynamically linked with it,
 |   is considered a "work that uses the Library" subject to the terms and
 |   conditions of the GNU Lesser General Public License.
 |
 |   The following has been added to the RXTX License to remove
 |   any confusion about linking to RXTX.   We want to allow in part what
 |   section 5, paragraph 2 of the LGPL does not permit in the special
 |   case of linking over a controlled interface.  The intent is to add a
 |   Java Specification Request or standards body defined interface in the 
 |   future as another exception but one is not currently available.
 |
 |   http://www.fsf.org/licenses/gpl-faq.html#LinkingOverControlledInterface
 |
 |   As a special exception, the copyright holders of RXTX give you
 |   permission to link RXTX with independent modules that communicate with
 |   RXTX solely through the Sun Microsytems CommAPI interface version 2,
 |   regardless of the license terms of these independent modules, and to copy
 |   and distribute the resulting combined work under terms of your choice,
 |   provided that every copy of the combined work is accompanied by a complete
 |   copy of the source code of RXTX (the version of RXTX used to produce the
 |   combined work), being distributed under the terms of the GNU Lesser General
 |   Public License plus this exception.  An independent module is a
 |   module which is not derived from or based on RXTX.
 |
 |   Note that people who make modified versions of RXTX are not obligated
 |   to grant this special exception for their modified versions; it is
 |   their choice whether to do so.  The GNU Lesser General Public License
 |   gives permission to release a modified version without this exception; this
 |   exception also makes it possible to release a modified version which
 |   carries forward this exception.
 |
 |   You should have received a copy of the GNU Lesser General Public
 |   License along with this library; if not, write to the Free
 |   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 |   All trademarks belong to their respective owners.
 --------------------------------------------------------------------------*/
#include "StdAfx.h"
#include "rxtxHelpers.h"

/*
 nativeGetVersion

 accept:      none
 perform:     return the current version 
 return:      version
 exceptions:  none
 comments:    This is used to avoid mixing versions of the .jar and
 native library.
 First introduced in rxtx-1.5-9
 * Class:     gnu_io_RXTXCommDriver
 * Method:    nativeGetVersion
 * Signature: ()Ljava/lang/String;
 */
JNIEXPORT jstring JNICALL Java_gnu_io_RXTXCommDriver_nativeGetVersion(
		JNIEnv *env, jclass cls) {
	return env->NewStringUTF("RXTX-2.0-1");
}

/*
 registerKnownPorts

 accept:      the type of port
 perform:     register any ports of the desired type a priori known to this OS
 return:      JNI_TRUE if any such ports were registered otherwise JNI_FALSE
 exceptions:  none
 comments:
 * Class:     gnu_io_RXTXCommDriver
 * Method:    registerKnownPorts
 * Signature: (I)Z
 */
JNIEXPORT jboolean JNICALL Java_gnu_io_RXTXCommDriver_registerKnownPorts(
		JNIEnv *env, jobject jobj, jint portType) {
	enum {
		PORT_TYPE_SERIAL = 1,
		PORT_TYPE_PARALLEL,
		PORT_TYPE_I2C,
		PORT_TYPE_RS485,
		PORT_TYPE_RAW
	};
	jboolean result = JNI_FALSE;

	switch (portType) {
	case PORT_TYPE_SERIAL:
		// We could check here what COMs are on system and register them.
		break;

	case PORT_TYPE_PARALLEL:
	case PORT_TYPE_I2C:
	case PORT_TYPE_RS485:
	case PORT_TYPE_RAW:
		break;

	default:
		// Wrong port type - I'd raise exception, but there's no defined for Java
		IF_DEBUG
		(
				printj(env, L"!!! RXTXCommDriver.registerKnownPorts(%ld): Wrong port type\n", portType);
				//MessageBox(NULL, TEXT("RXTXCommDriver.registerKnownPorts(): Wrong port type"), TEXT("Error"), MB_OK);
		)
		break;
	}
	return result;
}

/*
 isPortPrefixValid

 accept:      a port prefix
 perform:     see if the port prefix matches a port that is valid on this OS.
 return:      JNI_TRUE if it exists otherwise JNI_FALSE
 exceptions:  none
 comments:
 * Class:     gnu_io_RXTXCommDriver
 * Method:    isPortPrefixValid
 * Signature: (Ljava/lang/String;)Z
 */
JNIEXPORT jboolean JNICALL Java_gnu_io_RXTXCommDriver_isPortPrefixValid(
		JNIEnv *env, jobject jobj, jstring dev) {
	jboolean retVal;
	const char *szDev = env->GetStringUTFChars(dev, NULL);
	if (strncmp(szDev, "COM", 3) == 0 || strncmp(szDev, "LPT", 3) == 0) // is first 3 chars OK?
		retVal = JNI_TRUE;
	else
		retVal = JNI_FALSE;

	env->ReleaseStringUTFChars(dev, szDev);

	return retVal;

}

/*
 testRead

 accept:      dev The device to be tested
 perform:     test if the device can be read from
 return:      JNI_TRUE if the device can be read from
 exceptions:  none
 comments:    From Wayne Roberts wroberts1@home.com
 check tcget/setattr returns.
 support for non serial ports Trent
 * Class:     gnu_io_RXTXCommDriver
 * Method:    testRead
 * Signature: (Ljava/lang/String;I)Z
 */
JNIEXPORT jboolean JNICALL Java_gnu_io_RXTXCommDriver_testRead(JNIEnv *env,
		jobject jobj, jstring dev, jint type) {
	jboolean retVal;
	DWORD dwError;

	if (type == PORT_SERIAL) {
		const WCHAR *wszDev = env->GetStringChars(dev, NULL);
		HANDLE hPort = CreateFileW(wszDev,    // Pointer to the name of the port
				GENERIC_READ | GENERIC_WRITE,
				// Access (read-write) mode
				0,// Share mode
				NULL,         // Pointer to the security attribute
				OPEN_EXISTING,         // How to open the serial port
				0,            // Port attributes
				NULL);        // Handle to port with attribute
							  // to copy
		// If it fails to open the port, return FALSE.
		if (hPort == INVALID_HANDLE_VALUE) { // Could not open the port.
			IF_DEBUG
			(
					; //printj(env, TEXT("!!! RXTXCommDriver.testRead(%s, %ld): cannot open port\n"), wszDev, type);
					  //MessageBox(NULL, TEXT("RXTXCommDriver.testRead(): cannot open port"), wszDev /*TEXT("Error")*/, MB_OK | MB_SETFOREGROUND);
			)
			dwError = GetLastError();
			retVal = JNI_FALSE;
		} else { // Port open OK - let's close it and return TRUE
			if (!CloseHandle(hPort))
				dwError = GetLastError();
			IF_DEBUG
			(
					; //printj(env, TEXT("--- RXTXCommDriver.testRead(%s, %ld): port open OK\n"), wszDev, type);
					  //MessageBox(NULL, TEXT("RXTXCommDriver.testRead(): port open OK"), wszDev /*TEXT("Success")*/, MB_OK | MB_SETFOREGROUND);
			)
			retVal = JNI_TRUE;
		}
		env->ReleaseStringChars(dev, wszDev);
	} else
		retVal = JNI_FALSE;

	return retVal;
}

/*
 getDeviceDirectory

 accept:      
 perform:     
 return:      the directory containing the device files
 exceptions:  
 comments:    we need it only for Unix
 * Class:     gnu_io_RXTXCommDriver
 * Method:    getDeviceDirectory
 * Signature: ()Ljava/lang/String;
 */
JNIEXPORT jstring JNICALL Java_gnu_io_RXTXCommDriver_getDeviceDirectory(
		JNIEnv *env, jobject jobj) {
	return env->NewStringUTF("");
}
